Dec 10, 2025 · What is a cell? A cell is a mass of cytoplasm that is bound externally by a cell membrane. Usually microscopic in size, cells are the smallest structural units of living matter …

Jan 2, 2026 · First proposed by German scientists Theodor Schwann and Matthias Jakob Schleiden in 1838, the theory that all plants and animals are made up of cells marked a great …

cell, In biology, the basic unit of which all living things are composed; the smallest structural unit of living matter that is able to function independently.

The cell is the smallest unit with the basic properties of life. Some tiny organisms, such as bacteria and yeast, consist of only one cell. Large plants and animals have many billions of …

Jan 2, 2026 · Eukaryote, any cell or organism that possesses a clearly defined nucleus. The eukaryotic cell has a nuclear membrane that surrounds the nucleus, in which the well-defined …

Jan 6, 2026 · A cell is a mass of cytoplasm that is bound externally by a cell membrane. Usually microscopic in size, cells are the smallest structural units of living matter and compose all …

Enclosed by the cell membrane are the cell’s constituents, which include large, water-soluble, highly charged molecules such as proteins, nucleic acids, carbohydrates, and substances …

Nov 20, 2025 · Eukaryotic vs. prokaryotic cells: Key differences explained Learn about the difference between prokaryotes and eukaryotes.

Cell differentiation is a crucial part of development in multicellular organisms, since it results in cells with unique characteristics—such as muscle cells, neurons, or red blood cells —and …

Dec 10, 2025 · Cell - Differentiation, Organelles, Cytoplasm: Adult organisms are composed of a number of distinct cell types. Cells are organized into tissues, each of which typically contains …